Role of Co‐Sensitizers in Dye‐Sensitized Solar Cells

Krishna, Narra Vamsi; Krishna, Jonnadula Venkata Suman; Mrinalini, Madoori; Prasanthkumar, Seelam; Giribabu, Lingamallu

doi:10.1002/cssc.201701224

Cited by 63 publications

(28 citation statements)

References 82 publications

(179 reference statements)

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“…Co-sensitization have a double beneficial effect on DSSC operation: on the one hand, by increasing the amount of harvested solar photons an increase of photo-generated current is observed. On the other hand, a better coverage of the semiconductor surface reduced the detrimental charge recombination phenomena between the injected electron and the redox couple (Krishna et al, 2017 ). Co-sensitization can be achieved through two different processes: In the cocktail approach, co-sensitization is performed by mixing two sensitizers solutions with a specific molar ratio, while the stepwise approach is performed by sequential adsorption of the two different dye solutions.…”

Section: Sensitizersmentioning

confidence: 99%

Research Progress on Photosensitizers for DSSC

2018

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Dye sensitized solar cells (DSSC) are considered one of the most promising photovoltaic technologies as an alternative to traditional silicon-based solar cells, for their compatibility with low-cost production methods, their peculiar optical and mechanical properties and the high indoor efficiency. Photosensitizers represent one of the most important components of a DSSC device and probably the most thoroughly investigated in the last twenty years, with thousands of dyes that have been proposed and tested for this kind of application. In this review we aimed to provide an overview of the three main classes of DSSC photosensitizers, namely ruthenium(II) polypyridyl complexes, Zn-porphyrin derivatives and metal-free organic dyes. After a brief introduction about the architecture and operational principles of a DSSC and the state of the art of the other main components of this type of device, we focused our discussion on photosensitizers. We have defined the numerous requirements DSSC photosensitizers should satisfy and have provided an overview of their historical development over the years; by examining specific dyes reported in the literature, we attempted to highlight the molecular design strategies that have been established for the optimization of their performance in real devices both in terms of efficiency (which recently reaches an outstanding 14.3%) and operational stability. Finally, we discussed, in the last section, the possible future developments of this intriguing technology.

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Section: Sensitizersmentioning

confidence: 99%

Research Progress on Photosensitizers for DSSC

2018

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“…In contrast to the conventional systems, carriers are transported in the conduction band of the semiconductor to the charge collector. Overall solar (standard AM 1.5) to current conversion efficiencies (IPCE) over 10 % have been reached …”

Section: Third Generation Solar Cellsmentioning

confidence: 99%

Stipulating Low Production Cost Solar Cells All Set to Retail…!

Mrinalini

Islavath

Prasanthkumar

et al. 2018

The Chemical Record

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Today's solar cells are exceptionally in demand whilst excess exploitation of natural fossil fuels. In this context, the first and second generation solar cells commercially available in market for more than decades however limitations in production cost and large-scale applications insist to generate inexpensive materials for fabrication. Thereby, organic materials based solar cells explored and emerging as third generation solar cells which possess flexibility, low cost and large-scale applications. For example, organic photovoltaics, dye sensitized solar cells and perovskite (organic-inorganic) solar cells (PSCs) are considered third generation solar cells wherein PSCs reached the record power conversion efficiency (PCE~23 %) and durability assists great advantages for commercialization in near future. Moreover, we reported various global renowned companies involved producing the modules and materials for three generation solar cells, hence, majority of companies considered commercialization of perovskite based solar cells assist low cost photovoltaics to meet the current energy necessities and environmental safety.

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“…New technology for using solar energy is the solar cell, that converts solar light directly into electricity without any environmental pollution [11,12]. Dye‐sensitized solar cells (DSSCs) as the third generation of the solar cells, developed by O'Regan and Grätzel [13], have received a lot of attention due to advantages, such as simple manufacturing process, low cost, environmental compatibility, flexibility, transparency, and having a variety of dyes [14‐18]. A typical DSSC consists of a transparent conducting oxide, dye sensitizer, mesoporous TiO 2 film, the counter electrode (Pt), and electrolyte (I − /I − 3 ) [19‐21].…”

Section: Introductionmentioning

confidence: 99%

“…flexibility, transparency, and having a variety of dyes [14][15][16][17][18]. A typical DSSC consists of a transparent conducting oxide, dye sensitizer, mesoporous TiO 2 film, the counter electrode (Pt), and electrolyte (I − /I − 3 ) [19][20][21].…”

mentioning

confidence: 99%

Molecular engineering of triphenylamine‐based metal‐free organic dyes for dye‐sensitized solar cells

Pakravesh

Izadyar

Arkan

2021

Int J of Quantum Chemistry

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In this study, the photovoltaic properties of the organic dyes based on triphenylamine having a D-π-A structure including TC201, TC202, TC203, TC601, H-P, F-P, FF-P, T-F, and P1B were investigated theoretically. In this model, triphenylamine was used as an electron donor, cyanoacrylic acid, and benzoic acid as the electron acceptors, and anthracene phenyl, anthracene vinyl phenyl, anthracene ethynyl phenyl, ethynyl anthracene phenyl, styryl phenyl, styryl-2-fluorophenyl, styryl-2,6-difluorophenyl, styryl furan, and styryl as the π-conjugated systems. The results show that a change in the π-conjugated system and electron acceptor affect the properties of the dyesensitized solar cell (DSSC). Also, TC601 dye having the ethynyl anthracene phenyl π-conjugated system shows the highest charge transfer distance (D CT) and the least overlap of the electron-hole distribution (S) in comparison with other dyes. Moreover, the presence of a triple bond in the vicinity of triphenylamine increases the resonance effect of the π-electrons that facilitates the process of charge transfer in this dye. Spectroscopic analysis shows that H-P and F-P dyes have the higher molecular absorption coefficients and TC202, TC203, F-P, and T-F dyes show a red shift in comparison with other dyes. Moreover, the voltage-current curve of the studied dyes shows that the highest values of the open circuit voltage and short circuit current density are related to P1B and TC601 dyes, respectively. Finally, TC601 and P1B are proposed as the best candidates to be used in the DSSCs due to their maximum incident photon to current conversion efficiency.

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Role of Co‐Sensitizers in Dye‐Sensitized Solar Cells

Cited by 63 publications

References 82 publications

Research Progress on Photosensitizers for DSSC

Research Progress on Photosensitizers for DSSC

Stipulating Low Production Cost Solar Cells All Set to Retail…!

Molecular engineering of triphenylamine‐based metal‐free organic dyes for dye‐sensitized solar cells

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